needed - treo 270 SIM holder

the little SIM holder on the back of my treo 300 has fallen out and gone missing. i can't find a replacement piece here in india. i was told the version of the treo 300 they sell in the USA is CDMA, whereas mine was GSM. so where can i find a SIM holder for the treo 270 (GSM) online? and will it fit in my 300?